Improvement in treating tin scrap to obtain useful products



D. D. PARMELEE. I TREATING TIN SCRAP TO OBTAIN USEFUL memoirs.

No ;102,148. -PatentedApr."l'9, 1870.

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THE ECKERT LITHOGRAPHING CQ. WAHIHGTON, D. C

mediately under the cylinder, is formed a "dfin'iterl $211225 1 15mm Glljifiitc.

ASSIGNOR TO WALTER K.

Letters Patent No. 102,148,"dated April 19, 1870.

MROVEMENT IN TREATXNG I'm SCRAP TO OBTAIN USEFUL PRODUCTS.

'l'ho Bohodulo referred to in then Letters Patent and making m 0! Lb. nmo

To whom it may concern;

for the purpose of utilizing or manufacturing them into wrought'iron, cast-iron, and steel, as described in Letters Patent granted to me on the 29th day of June, 1869, numbered 91,962.

The following is a description of the process, and of a form of apparatus which is well adapted to carry outthe same, and, also, of the conditions required to properlyemploy it.

Theaccompanying drawing is a side elevation, partly in section, of the apparatus' 4 represents a cast or wrought-iron cylinder of suitable dimensions, say feet high and three feetin diameter, having a. cast-iron bottom, with a projecting so as to form a steady support for the cylinder. A lid, b, is also provided, formed so as to fit the cylinder tightly.

A second cylinder, 0, is placed within and fits'loosely in the outer cylinder 0, so that it may be easily removed therefrom and replaced. This cylinder is closed at its bottom, but opcnat the top, where handles (1 d are attached, and is perforated with many holes in both its sides and its bottom. This portion of the apparatus rests on a brick foundation, in whicln'and imfire-place, the-door of which is shown at c.

The cylinder a is connected by pipe f with a lead flask or retort, g, for generating or producing chlorine gas. This retort rests in and is heated by asandbath, h, on top of an iron cylinder, 1', which is placed upon a brick foundation, and seryes to support the retort, and to form :r lire-place for heating the sandbath. The door of this fire-place is shown at j.

The retort is provided with a stirrer or agitator, k, for mixing the ingredients in the retort l'or liberating the chlorine.

The gas produced 'imthe; retort is conveyed to the cylinder :1 through the pipe f.

Upon the pipe f between the chlorineretort and the cylinder, is placed a tube of glass or other suitable nateriah I, intended chloride of calcium, for the purpose of drying the gas before it reaches the cylinder or scrap'chnmber a.

l rorn the lower part of the cylinder a extendsa tube, or, preferably made ofglass, which passes through the water-tight box it, and connects with the receptacle or Woulfe bottle 0. The box is to be filled with water, and the tube is intended to condense the vapors formed in the chamber a, and convey them to the receptacle o.

The mode of conducting the process wit-h this apparatus is as follows:

Remove the perforated cylinder or basket 0 by any suitable hoisting apparatus, coat it, as well as the interior of the chamber a, with plumbago, till the basket with tin scraps,

the lid b. The pipe j, which is removable, should then be adjusted to the lid, and the chloride of calcium tube 1 and the box 21- filled with water. Next charge the (chloride of sodium,) and one (l) part of peroxide of manganese, thoroughly mixed together before their introduction into the retort, and add two (2) parts of sulphuric acid, diluted with arr-equal weight of water. Agitaie the whole together by means of the stirrer k.

A gentle wood fire is then made in the fire-place e, to heat the bottom of the chamber a to about 200 Fahrenheit, and a gentle fireis also made in the the place j, to warm the lead retort y.

The chlorine gas is then liberated, passes 05 through the pipe f and chloride-oi cahfrurn tube 1, where it is dried, into the chamber a, and, being heavier than air, descends through-the tin scraps, unites with. the tin coating, and forms the anhydrous biehloride of tin, which, from the heat resulting from the chemical action, is in the form of vapor. This passes olf through to he filled with lumps of fusfid j the glass tube 1n into the Woulfe bottle o, conrlensiug into a fluid lgnown as the fuming liquid of Libnrius.

The operation is continued until the white fumes of the chloride of tin cease to be formed, and the green chlorine gas appears in the glass tube. The o eration is their suspended by removing the pipe f from the cylinder or chamber a, and a second chamber, of precisely the some wustructlon, may be provided, to which, after having been charged with tin scraps, the pipe f may be attached, thus enabling the operation to progress without intermission or appreciable loss of time.

Thelid of the chamber a is then removed, the per- .orated cylinder and scraps of tin hoisted out, and, after recharging, the operation is repeated. If the process has been carried out as described, the iron is perfectly freed from tin, and is annealed by the chemical heat to which it has been subjected.

The removal oi the tin is effected without burning or oxidizing the iron, which is let! in a perfect rondb tlou to be employed for any purpose, but especially for the nurnnfrtcture of steel.

The chloride of tin, one of the products of this proreplace it in the chamber and put onv retort or flask g with three (3) parts of common salt,

cess, is of special valueto dyers and calico printers, and in other technical branches; but, if desired, it can be readily decomposed, and the tin reduced to the metallic state.

Having described my invention,

What I claim, and desire to secure by Let-leis Pateat is 1. The process of removing the tin from waste tin scraps by treating the same in an enclosed vessel with chlorine gas, and then carrying oil and conden ing the vapor or fumes arising from the chemical union of the gas with the tin coating, substantially as set forth.

2. The herein-described apparatus for carrying out the process above specified.

In testimony wheieofl have signed my name to this specification before two subscribing witnesses.

DUBOIS D. PARMELEE. Witnesses: I

WILLIS BJMsnvuz, Jsmms M.'RING. 

